TM 55-1520-240-23-5
6-58
INSPECT FORWARD AND AFT ROTOR SHAFT
(Continued)
6-58
NOTE
The sensitivity to damage of the spline
teeth differs among the three areas.
The spline tooth lower two thirds,
including spline roots, is the highest
loaded and most sensitive of the three
areas. The spline tooth upper one
third is less sensitive than the lower
two thirds. The spline tooth tips are
the least sensitive of the three areas.
(a)
Spline tooth lower two thirds including
spline roots (reference 0.20 inch). No
pitting corrosion, nicks or scratches
are allowed in this area. A light visual
indication of wear or wear step is
permitted provided it does not exceed
0.0010 inch depth.
(b)
Spline tooth upper one third (reference
0.10 inch). Nicks, dings, or scratches
are allowed in this area up to a depth
of 0.0020 inch. No pitting corrosion
is allowed that exceeds 0.0010 inch.
Lightly blend nicks, dings, scratches,
and pitting corrosion.
(c)
Spline tooth tips. Pitting corrosion,
nicks, dings, or scratches are allowed
in this area up to a depth of 0.010
inch. Lightly blend and polish tip.
Remove any sharp edges from nicks,
dings, and scratches.
2.1.
Inspect fwd rotor shaft for cracks. If a crack is
suspected, refer to TM 1-1520-253-23.
3.
Check thread (3) for damage. There shall be
no damage.
4.
Inspect bushings (4) at top and bottom of four
mounting holes in support (5). There shall be no
cracks, wear, or other damage.
5.
Check support (5) for oil leakage. There shall
be no oil.
5.1.
Inspect aft rotor shaft for cracks. If a crack is
suspected, refer to TM 1-1520-253-23.
6.
Inspect slider shaft (6) for damage. Damage shall
not exceed the limits specified in Task 6-52.1.
7.
Inspect seal. Ensure that a minimum clearance
of 0.050 inch between the rubber seal and the
surface of the rotor shaft. If a minimum clearance
does not exist between the shaft and seal,
inspect the seal for deterioration and damage.
There shall be no damage.
FOLLOW-ON MAINTENANCE:
None
END OF TASK
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